/* Example of Stream Iterators and advance() */
#include <iterator>
#include <iostream>
#include <string>
#include <algorithm>

using namespace std;

int main()
{
	istream_iterator<string> cinPos(cin), eof;
	ostream_iterator<string> coutPos(cout, " ");

	// while input is not at the end of the file
	while (cinPos != eof)
	{
		// ignore the following two strings
		advance(cinPos, 2);

		// read and write the third string
		if (cinPos != eof)
		{
			*coutPos = *cinPos++;
		}
	}
	cout << endl;

	return 0;
}